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Effect of substitution at the barium site in YBa2Cu3O7-δ

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Abstract

The oxygen content in YBa2Cu3O7-δ has been varied by substitution at Ba site with Sr or K and its influence on the structural and superconducting properties has been studied. These properties are compared with that of unsubstituted YBa2Cu3O7-δ prepared by quenching. The increase inδ value of YBa2Cu3O7-δ decreases theT c drastically, whereas in YBa2-χKχCu3O7-δ system increase in theδ value (as high as 0·92) does not affect the superconducting transition temperature, which remains above 77 K. In the YBa2-χSrχCu3O7-δ system, as Sr content increases there is marginal decrease in the oxygen content as well as in the superconducting transition temperature.

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Authors and Affiliations

  1. Department of Chemistry, Indian Institute of Technology, 600 036, Madras, India

    N S Raman & B Viswanathan

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  1. N S Raman
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  2. B Viswanathan
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Raman, N.S., Viswanathan, B. Effect of substitution at the barium site in YBa2Cu3O7-δ . Bull. Mater. Sci. 16, 381–391 (1993). https://doi.org/10.1007/BF02759551

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  • DOI: https://doi.org/10.1007/BF02759551

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